Rosalyn Isam Marar, MD
Internal Medicine Physician · Rochester, MN
Rosalyn Isam Marar, MD is an internal medicine physician with a practice address in Rochester, Minnesota, and NPI 1750907622, issued on Jun 17, 2020. Check the license (Minnesota 73491, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Rosalyn Isam Marar
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 73491 MN
8842 NE
Self-reported in NPPES; status is on the state search - Practice location
- 200 1St Street SW, Rochester, MN 55905
- Phone
- (507) 284-2511
- Enumerated
- Jun 17, 2020
- Record last updated
- Oct 25, 2023
- Medicare enrollment
- Enrolled (PECOS I20230523001330); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,632 in Minnesota → Look up another NPI →
Also registered at 200 1St Street SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Rosalyn Isam Marar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 73491Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
336 Medicare Part D claims for 46 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Dexamethasone34 claims
- Acyclovir17 claims
- Eliquis14 claims
- Prednisone14 claims
- Brukinsa13 claims
- Prochlorperazine Maleate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $21.61
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mayo ClinicRochester, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rosalyn Isam Marar among 2,632 internal medicine physician records in Minnesota
Rosalyn Isam Marar, MD is one of 2,632 internal medicine physician records with a practice address in Minnesota. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 81% of them.
- NPI issued2020 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2020 · median 2008 among the 1,700 with a school on file
- Record last updated2023 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
545 internal medicine physician records list a practice address in Rochester
They are 545 of the 12,854 NPPES records with a practice address in Rochester, and 2,632 internal medicine physician records in Minnesota.
All 2,632 in Minnesota → Every provider in Rochester → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shari Bornstein, MDRochester, MN 559051679556005
- David Cook, M.D.Rochester, MN 559051891772554
- John Davidson, M.D.Rochester, MN 559051609852698
- Brian Dougan, M.D.Rochester, MN 559051942204383
- Eduardo Duenas-Barajas, M.D.Rochester, MN 559051235116914
- Murali Duggirala, M.D.Rochester, MN 559051740267418
- Amit Ghosh, M.D.Rochester, MN 559051093791253
- Donald Hensrud, M.D.Rochester, MN 559051467438473
Common questions
What is Rosalyn Isam Marar, MD's NPI number?
Rosalyn Isam Marar, MD's National Provider Identifier (NPI) is 1750907622, issued on Jun 17, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Rosalyn Isam Marar, MD located?
The NPPES record lists a practice address at 200 1St Street SW, Rochester, MN, 55905. Phone: (507) 284-2511. Providers update this record themselves, so call before visiting.
How can I verify Rosalyn Isam Marar, MD's license?
NPPES lists Minnesota license number 73491, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rosalyn Isam Marar, MD prescribe under Medicare Part D?
In 2024, Rosalyn Isam Marar, MD had 336 Medicare Part D claims for 46 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.